AxB1-xCyD1-y型四元混晶光学声子性质的研究

罗飞; 刘维清; 刘燕勇

doi:doi:10.3969/j.issn.1007-5461.2014.02.017

量子电子学报, 2014, 31 (2): 233, 网络出版: 2014-03-31

A_xB_1-xC_yD_1-y型四元混晶光学声子性质的研究

Investigation of optical phonon properties in A_xB_1-xC_yD_1-y mixed crystals

论文大纲

罗飞 ^*刘维清刘燕勇

作者单位

江西理工大学理学院, 江西赣州 341000

光电子学光学声子混晶组分波恩-黄昆方程 optoelectronics optical phonon mixed crystals concentration Born-Huang equations

摘要

针对现有理论的不足,提出了新的Ax B1-x Cy D1-y 型四元混晶中晶格振动理论模型, 利用Clausius-Mossotti公式对运动方程组加以简化,同时引入波恩-黄昆方程消除微观变量, 最终得到混晶声子频率对组分(x,y)的依赖关系。该理论模型优点在于只需知道AC、AD、BC和BD四种二元混晶的若干参数(光学声子横模频率、纵模频率和晶体的静态介电常数和光学介电常数), 就可求出Ax B1-x Cy D1-y 型四元半导体混晶的光学声子特性,当组分取边界值时,结果则对应三元和二元晶体。理论结果与实验数据符合较好,对今后实验有一定指导作用。

Abstract

In order to overcome the shortcoming involved with the current theory, the new theory model of lattice vibration in Ax B1-x Cy D1-y quarternary mixed crystals was described. Using the Clausius-Mossotti formula for simplifying the motion equations, and Born-Huang equations for eliminating microscopic variables, the relationship between optical phonon and elemental concentrations (x,y) of mixed crystals was obtained. The advantage of the proposed theory model is that the optical phonon character of Ax B1-x Cy D1-y quarternary mixed crystals can be solved only by several parameters of the binary mixed crystals such as AC, AD, BC and BD. The parameters include TO mode frequency, LO mode frequency, static dielectric constant and optical dielectric constant. Taking the boundary values, the results are corresponding to ternary mixed crystals and binary mixed crystals. The theoretical results and experimental data meet well with each other, which give certain guidance to future experiments.

参考文献

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罗飞, 刘维清, 刘燕勇. A_xB_1-xC_yD_1-y型四元混晶光学声子性质的研究[J]. 量子电子学报, 2014, 31(2): 233. LUO Fei, LIU Wei-qing, LIU Yan-yong. Investigation of optical phonon properties in A_xB_1-xC_yD_1-y mixed crystals[J]. Chinese Journal of Quantum Electronics, 2014, 31(2): 233.

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